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Constraining Cosmic Microwave Background Temperature Evolution With Sunyaev–Zel’Dovich Galaxy Clusters from the Atacama Cosmology Telescope

Journal Article · · The Astrophysical Journal
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  1. Johns Hopkins Univ., Baltimore, MD (United States)
  2. Univ. of Toronto, ON (Canada)
  3. Cornell Univ., Ithaca, NY (United States)
  4. Univ. of Rome (Italy)
  5. Cardiff Univ., Wales (United Kingdom)
  6. Univ. of Pennsylvania, Philadelphia, PA (United States)
  7. Princeton Univ., NJ (United States)
  8. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  9. Univ. of Southern California, Los Angeles, CA (United States)
  10. Univ. of Pittsburgh, PA (United States)
  11. Univ. of British Columbia, Vancouver, BC (Canada)
  12. Univ. of KwaZulu-Natal, Durban (South Africa)
  13. Univ. of Chicago, IL (United States); Univ. of Michigan, Ann Arbor, MI (United States)
  14. Flatiron Institute, New York, NY (United States)
  15. Univ. of Milan (Italy)
  16. Haverford College, PA (United States)
  17. Stanford Univ., CA (United States)
  18. California Institute of Technology (CalTech), Pasadena, CA (United States)
  19. Stony Brook Univ., NY (United States)
  20. Pontifica Universidad Catolica de Valparaiso (Chile)
  21. Arizona State Univ., Tempe, AZ (United States)
  22. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  23. Univ. of Pennsylvania, Philadelphia, PA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
+ Show Author Affiliations

The Sunyaev–Zel'dovich (SZ) effect introduces a specific distortion of the blackbody spectrum of the cosmic microwave background (CMB) radiation when it scatters off hot gas in clusters of galaxies. The frequency dependence of the distortion is only independent of the cluster redshift when the evolution of the CMB radiation is adiabatic. Here, using 370 clusters within the redshift range 0.07 ≲ z ≲ 1.4 from the largest SZ-selected cluster sample to date from the Atacama Cosmology Telescope, we provide new constraints on the deviation of CMB temperature evolution from the standard model $$\alpha ={0.017}_{-0.032}^{+0.029}$$, where $$T(z)={T}_{0}{\left(1+z\right)}^{1-\alpha }$$. This result is consistent with no deviation from the standard adiabatic model. Combining it with previous, independent data sets we obtain a joint constraint of α = –0.001 ± 0.012. Attributing deviation from adiabaticity to the decay of dark energy, this result constrains its effective equation of state $${w}_{\mathrm{eff}}=-{0.998}_{-0.010}^{+0.008}$$.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); Princeton University; University of Pennsylvania; Canada Foundation for Innovation (CFI); National Aeronautics and Space Administration (NASA); Natural Sciences and Engineering Research Council of Canada (NSERC); Alfred P. Sloan Foundation; National Research Foundation of South Africa; National Fund for Scientific and Technological Development (FONDECYT)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1893859
Journal Information:
The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 2 Vol. 922; ISSN 0004-637X
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
Sunyaev-Zeldovich effect
cosmic microwave background radiation
cosmology
galaxy clusters